#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

int main() {
	int P;
	cin >> P;
	unsigned long long ans =1;
	for (int i = 0; i < P; i++)
	{
		ans *= 10;
	}
	ans-=1;
	unsigned long long minus = 1;
	for (int i = 0; i < P; i++) {
		minus *= 9;
	}
	minus /= 3;
	minus *= 2;
	ans -= minus;
	cout << ans  << endl;
}